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Full Discussion: How to load an array with desired lines with awk
Top Forums Shell Programming and Scripting How to load an array with desired lines with awk Post 302504781 by Chubler_XL on Tuesday 15th of March 2011 12:01:22 PM
Old 03-15-2011
For commas all on one line try this:
Code:
awk '/^$/||/^__/{A=0} A&&!/^--/{R=R","$1}
/^(Category|Titles|Authors)/{R=R?R",":"")$0;A++}
END{print R}' inputfile

If doing it with ranges I would try and avoid having 3 seperate ranges, otherwise you end up with 3 identical blocks to process the lines. This is fine if you fell that the processing for each block is likley to change at a later date, but otherwise stick with the shorter solution:

Code:
awk '/^(Category|Titles|Authors)/,/^$/ { 
if ($0&&$0!~"^---") R=(R?R",":"")$1}
END {print R}' inputfile

 

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LEARN ABOUT SUSE

igawk

IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME

       igawk - gawk with include files

SYNOPSIS

       igawk [ all gawk options ] -f program-file [ -- ] file ...
       igawk [ all gawk options ] [ -- ] program-text file ...

DESCRIPTION

       Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).

       AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like

	      @include getopt.awk

       in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.

OPTIONS

       See gawk(1) for a full description of the AWK language and the options that gawk supports.

EXAMPLES

       cat << EOF > test.awk
       @include getopt.awk

       BEGIN {
	    while (getopt(ARGC, ARGV, "am:q") != -1)
		 ...
       }
       EOF

       igawk -f test.awk

SEE ALSO

       gawk(1)

       Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.

AUTHOR

       Arnold Robbins (arnold@skeeve.com).

Free Software Foundation					    Nov 3 1999								  IGAWK(1)
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